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//---------------------------------------------------------------------------
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// Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
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// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//
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// Except as contained in this notice, the name of Dallas Semiconductor
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// shall not be used except as stated in the Dallas Semiconductor
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// Branding Policy.
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//---------------------------------------------------------------------------
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//
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// owSesU.C - Acquire and release a Session on the 1-Wire Net.
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//
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// Version: 2.01
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//
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// History: 1.03 -> 2.00 Changed 'MLan' to 'ow'. Added support for
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// multiple ports.
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// 2.00 -> 2.01 Added error handling. Added circular-include check.
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// 2.01 -> 2.10 Added raw memory error handling and SMALLINT
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// 2.10 -> 3.00 Added memory bank functionality
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// Added file I/O operations
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//
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#include "mbed.h"
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#include "ownet.h"
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#include "./Headers/ds2480.h"
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//---------------------------------------------------------------------------
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// Attempt to acquire a 1-Wire net using a com port and a DS2480 based
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// adapter.
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//
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// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
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// OpenCOM to indicate the port number.
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// 'port_zstr' - zero terminated port name. For this platform
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// use format COMX where X is the port number.
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//
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// Returns: TRUE - success, COM port opened
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//
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// exportable functions defined in ownetu.c
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SMALLINT owAcquire(int portnum, char *port_zstr)
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{
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// attempt to open the communications port
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if (OpenCOM(portnum,port_zstr) < 0)
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{
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OWERROR(OWERROR_OPENCOM_FAILED);
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return FALSE;
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}
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// detect DS2480
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if (!DS2480Detect(portnum))
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{
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CloseCOM(portnum);
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OWERROR(OWERROR_DS2480_NOT_DETECTED);
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return FALSE;
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}
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return TRUE;
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}
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//---------------------------------------------------------------------------
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// Attempt to acquire a 1-Wire net using a com port and a DS2480 based
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// adapter.
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//
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// 'port_zstr' - zero terminated port name. For this platform
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// use format COMX where X is the port number.
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//
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// Returns: valid handle, or -1 if an error occurred
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//
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// exportable functions defined in ownetu.c
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//
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int owAcquireEx(char *port_zstr)
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{
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int portnum;
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// attempt to open the communications port
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if ((portnum = OpenCOMEx(port_zstr)) < 0)
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{
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OWERROR(OWERROR_OPENCOM_FAILED);
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return -1;
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}
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// detect DS2480
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if (!DS2480Detect(portnum))
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{
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CloseCOM(portnum);
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OWERROR(OWERROR_DS2480_NOT_DETECTED);
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return -1;
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}
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return portnum;
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}
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//---------------------------------------------------------------------------
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// Release the previously acquired a 1-Wire net.
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//
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// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
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// OpenCOM to indicate the port number.
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//
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void owRelease(int portnum)
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{
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CloseCOM(portnum);
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}
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Steven Vlach